fix(server-utils): Keep node:async_hooks out of the edge/browser barrels

The Hydrogen (Oxygen) e2e app `remix-hydrogen` failed to build: its client bundle
pulled `@sentry/server-utils/async-context` (`import { AsyncLocalStorage } from
'node:async_hooks'`), which Vite externalizes into an empty stub, throwing
`"AsyncLocalStorage" is not exported by "__vite-browser-external"`.

`async-context` is the only module in the shared `exports.ts` surface that
statically imports a `node:` builtin, yet it was re-exported from both the `index`
and `no-diagnostic-channels` barrels — so any browser/edge bundle importing *any*
helper from those barrels dragged `node:async_hooks` into the graph.

- Move `setAsyncLocalStorageAsyncContextStrategy` out of the shared `exports.ts`
  into a dedicated `@sentry/server-utils/async-context` entry, so `index` /
  `no-diagnostic-channels` are free of `node:` builtins. Update its consumers
  (Node/Deno/Cloudflare SDKs + tests), all of which run where `node:async_hooks`
  resolves.
- Point the two `@sentry/remix/cloudflare`-reachable imports (`instrumentServer`'s
  `loadModule`, `cloudflare/index`'s `trpcMiddleware`) at the lean
  `no-diagnostic-channels` barrel instead of the full `@sentry/server-utils`
  barrel, whose Node-only integrations (`tedious` → `node:events`, …) otherwise
  reach the bundled Hydrogen client build.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D7JDQBD9J2okCe1hkWCanU

Author: mydea

packages/cloudflare/src/durableobject.ts

@@ -2,7 +2,7 @@
 import { RPC } from '@sentry/conventions/op';
 import { isObjectLike } from '@sentry/core';
 import type { DurableObject } from 'cloudflare:workers';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import type { CloudflareOptions } from './client';
 import { getInstrumented, markAsInstrumented } from './instrument';
 import { instrumentDurableObjectHandlers } from './instrumentations/instrumentDurableObjectHandlers';

packages/cloudflare/src/index.ts

@@ -137,4 +137,4 @@ export {
 
 export { instrumentWorkflowWithSentry } from './workflows';
 
-export { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+export { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';

packages/cloudflare/src/instrumentations/instrumentWorkerEntrypoint.ts

@@ -1,6 +1,6 @@
 import type { RpcStub, WorkerEntrypoint } from 'cloudflare:workers';
 import { RPC } from '@sentry/conventions/op';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import type { CloudflareOptions } from '../client';
 import { getFinalOptions } from '../options';
 import type { DefaultEnv, ResolveEnv, StrictCloudflareOptions } from '../types';

packages/cloudflare/src/pages-plugin.ts

@@ -1,4 +1,4 @@
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import type { CloudflareOptions } from './client';
 import type { ExecutionContextCompat } from './executionContext';
 import { wrapRequestHandlerWithInit } from './wrapRequestHandlerWithInit';

packages/cloudflare/src/withSentry.ts

@@ -1,4 +1,4 @@
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import { instrumentExportedHandlerEmail } from './instrumentations/worker/instrumentEmail';
 import { instrumentExportedHandlerFetch } from './instrumentations/worker/instrumentFetch';
 import { instrumentExportedHandlerQueue } from './instrumentations/worker/instrumentQueue';

packages/cloudflare/src/workflows.ts

@@ -22,7 +22,7 @@ import type {
   WorkflowStepRollbackOptions,
   WorkflowTimeoutDuration,
 } from 'cloudflare:workers';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import type { CloudflareOptions } from './client';
 import { flushAndDispose, getOriginalWaitUntil } from './flush';
 import { instrumentEnv } from './instrumentations/worker/instrumentEnv';

packages/cloudflare/test/client.test.ts

@@ -1,5 +1,5 @@
 import { beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import { CloudflareClient, type CloudflareClientOptions } from '../src/client';
 import { makeFlushLock } from '../src/flush';
 import { getInvocationState } from '../src/utils/invocationContext';

packages/cloudflare/test/instrumentCloudflareAgent.test.ts

@@ -8,7 +8,7 @@ import {
   startSpan,
 } from '@sentry/core';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import { CloudflareClient, type CloudflareClientOptions } from '../src/client';
 import { withStaticSpan } from '../src/index';
 import { instrumentCloudflareAgent } from '../src/instrumentations/agents';

packages/cloudflare/test/instrumentations/instrumentWorkerEntrypoint.test.ts

@@ -176,7 +176,7 @@ describe('instrumentWorkerEntrypoint', () => {
   });
 
   it('Calls setAsyncLocalStorageAsyncContextStrategy outside Proxy (at instrumentation time), not inside construct', async () => {
-    const asyncModule = await import('@sentry/server-utils/no-diagnostic-channels');
+    const asyncModule = await import('@sentry/server-utils/async-context');
     const setStrategy = vi.spyOn(asyncModule, 'setAsyncLocalStorageAsyncContextStrategy');
     const mockContext = createMockExecutionContext();
     const TestClass = class extends WorkerEntrypoint {

packages/cloudflare/test/opentelemetry.test.ts

@@ -1,7 +1,7 @@
 import { trace } from '@opentelemetry/api';
 import type { TransactionEvent } from '@sentry/core';
 import { getActiveSpan, spanToJSON, startSpan } from '@sentry/core';
-import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/no-diagnostic-channels';
+import { setAsyncLocalStorageAsyncContextStrategy } from '@sentry/server-utils/async-context';
 import { beforeEach, describe, expect, test, vi } from 'vitest';
 import type { CloudflareOptions } from '../src/client';
 import { wrapRequestHandler } from '../src/request';